mbw

NAME

SYNOPSIS

DESCRIPTION

mbw
determines available memory bandwidth by copying large arrays of data in memory.

OPTIONS

-q

Quiet; suppress informational messages.

-a

Suppress printing the average of each test.

-n <number>

Select number of loops per test

-t <number>

Select tests to be run. If no -t parameters are given the default is to run all tests. -t0: memcpy() test, -t1: dumb (b[i]=a[i] style) test, -t2: memcpy() with arbitrary block size

-b <bytes>

Block size in bytes for -t2.

-h

Show quick help.

USAGE

mbw
will allocate two
arraysize
arrays in memory and copy one to the other.
Reported 'bandwidth' is the amount of data copied over the time this operation took.

Obviously
mbw
needs twice
arraysize
MiBytes (1024*1024 bytes) of physical memory - you'd better switch off swap or
otherwise make sure no paging occurs. Needless to say that it should not be run
on a busy system.